Family Dollar said its board unanimously rejected Dollar General’s revised takeover bid, again citing antitrust concerns and reiterating its support for a deal with smaller rival Dollar Tree. Family Dollar’s shares fell slightly to $79.65 in premarket trading. Dollar General’s shares fell 1.2% to $63.70. Dollar Tree shares were down 0.7% to $54.62.

Intercontinental Exchange Inc. said it would acquire SuperDerivatives for about $350 million in cash to expand its financial market clearing and data services. Shares were inactive premarket.

U.S. regulators on Thursday approved a new kind of cancer drug from Merck & Co. that is designed to unleash the body’s immune system against tumors.

Apple Inc. said it plans additional steps to keep hackers out of user accounts, but it denied that a lax attitude toward security had allowed intruders to post nude photos of celebrities on the Internet.

BP PLC was grossly negligent in the 2010 Deepwater Horizon disaster, a federal judge ruled Thursday, handing down a decision that could cost the company as much as $18 billion in pollution fines for the Gulf of Mexico oil spill.

Kroger Co. said it is looking to hire 20,000 permanent employees for its growing chain of supermarkets.

Recro Pharma Inc. plans to launch a revised study of its lead product candidate, a non-opiod painkiller called Dex-IN, after an interim analysis of Phase IIb study data showed the treatment’s efficacy as a standalone drug wasn’t sufficient to manage severe pain in bunionectomy treatment on the day of surgery.

Prana Biotechnology Ltd. said the Food and Drug Administration granted Orphan Drug designation to its PBT2 drug for the treatment of Huntington Disease.

Quiksilver Inc. on Thursday reported third-quarter sales were lower than expected, with its Americas and Europe-Middle East-Africa segments reporting double-digit declines, along with its wholesale channel.

Cooper Cos.'s fiscal third-quarter profit fell slightly, even as revenue at its vision and surgical segments continued to improve.

Two of luxury-apparel company Michael Kors Holdings Ltd.'s majority shareholders will sell off their stock and step down from the company’s board, reducing membership to five from the current seven, the company disclosed on Thursday in a regulatory filing.